LiftMaster Sprocket Kit, 42 Tooth, 1" Bore X 1/4" Keyway | LIF-71-1550B42LGH sysparc xv2020 you can tackle tough and

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LiftMaster Sprocket Kit, 42 Tooth, 1" Bore X 1/4" Keyway | LIF-71-1550B42LGH sysparc xv2020 you can tackle tough andLiftMaster Sprocket Kit, 42 Tooth, 1" Bore X 1 4" Keyway LIF 71 1550B42LGH 71 1550B42LGH is a 42 Tooth Sprocket Kit (1" Bore x 1 4" Keyway), for #50 chain. For use as a door sprocket and compatible with LiftMaster MAXUM Standard and Extended Duty JDC JHDC, and Logic 4. 0 5. 0 Commercial Door Operators. Kit includes shaft key. Genuine LiftMaster replacement part.